Diagnosing Collinearity

What is NOT a recommended strategy in addressing collinearity?

• Penalised regression

• Dropping one variable

• Combining covariates

• Centering the variables

We can use this correlation matrix to diagnose collinearity

• TRUE

• FALSE

Choose all visual tools which can be used to diagnose collinearity

• 
• 
• 
• 

What is the level of collinearity if VIF = 15?

• No collinearity

• Moderate collinearity

• High collinearity

• Not sure

What is used to calculate VIF?

• R^2

• Standard Error

• AIC

• Residuals